Type-writer attachment.



PATENTED JUNB5, 1906.

APPLICATION FILED D30. 24, 1903.

Illilf":

- 'buiier, thereby taking up the sud en jar i n-f "UNITED STA ES PATENT.OFFICE." CHARLES F. WASHBUR-N, or NEW LbNDoN, connno'rronr.

' .TYPE-wmT hTrAcHMEMT.

specification of LettersIPatent.

Patented June 5, 1906.

Application filed-December 24,1903. Serial No. 136,465.

Toall whom it may concern:

Be it knownthat I, CHARLES F. WASH- BURN, a citizen of. the UnitedStates, residing at, New London, in the county of New London and Stateof Connecticut, have invented a'new and useful Type-Writer Attachment,

of which the following is a' specification.

' chine and having a ing the practical applicationof my invention,

order to illustrate t This invention relates generally to typewritingmachines, and'particulaily to ta lating-machines in win b the carriageis caused to move rapidly and stop suddenly, as-when movin fromthe'position of thousands to hundre s, and from hundreds to tens, andfrom tensto-units, and 'fromwmits to decimals. In machines ofthiskiudsudden stopping or checking ofthe carriage at the predetermined point isliable to cause the various parts to get out of order; and the object ofmy invention, is therefore-t0 provide-a machine of this characterwithaneumatic' c identalto the sudden stopping of the car- FVith thisobject in view my invention .consists, essentiall in the employmentofacylinder or tube ed to the frame of thema acylinder or tube whichisfixedto the carriage sliding therein. .The fixed tube or cylinder has avalve-outlet, by means of which the escape of air from the cylinder canbe regulated. v

l The inventionalso comprehends the use of a piston slidingin thecylinder, said piston being. connected to the carriage of the machine.

The invention consists also in certain details 'oiv constructionhereinafter fully de-. scribed, and pointed out in the claim. Inthedrawings forming part of this's fication, Figure 1 is a perspective views owa portion of the tyge writer being shown in e relative pos tion ofthe various parts of my detail view ofmy im rovement, ar tly in sectionan partly in e evation. 1 3 is a detail vie showing the slight mod"cation- Referring to the drawings, A indicates a be so' sudden as itwould I parts are not so likely with the carriage and eci-' adjustablevalve in said invention. Fig. 2 is a stationary ortion or frame of thetypewriter, and the carriage.

A cyhnder or cylindrical tube 0 is rigidly secured to the left-handpost- D of the frame V by meansofa suitable clip E, the outer end ofsaid cylinder having a valve-plug F threaded-therem, the valve F beingcapable ofregw lation, so that the escapement of air from the cylindercanbe regulated with accuracy. Sliding in the cylinder 0 is a piston G,fastened to the right-hand memberH of the carria e, and this piston-maybe tubularor cylin icalinform, as sown in Figs. 1 and 2, or' it may besolid, asshown at I in Fig. 3, said piston being arraned upon the end ofthe rod K, said rod belngattached to the member H in the same manner-asthe cylin-' der G.

- Thus it will beseenthat when the carriage l moves rapidl y -from r1ghtto left.the piston slidingin the cylinder. will compress or partiallycompress. air containedtherein, and tlus pneumatic cushion v will serveto partially the movement of the carriage, so that' chec when themovement of said carriage is arrested by-means of the sto s avebeen hadthe pneumatic cushion not been employed.

By means of this construction the machine is not subject to sudden jarsand the various to getout oforder.

Having thus fully described my invention, what I claim as new, anddesire to secure Letters Patent, is-

An'attachment for tabulating type-writers, com rising a cylinder arrangeon the frame of t e type-writer adj acent to and parallel open at itsinner end, a valve-plug threaded into its outer end, an

plug, and a piston attached to the carriage and adapted to slide in thecylinder and check movement'of the carria'ge in one direction.

Witnesses: L. SMITH,

J. I. GAnnNnn,

the stop will not CHAS. FQWAs HBUnN."

